[EM] VoteFair Ranking software version 6.0 in C++ with MIT license

Kristofer Munsterhjelm km_elmet at t-online.de
Sun Jan 5 05:48:52 PST 2020

On 04/01/2020 01.58, VoteFair wrote:
> On 1/2/2020 3:00 PM, Kristofer Munsterhjelm wrote:
>> ...
>> The VoteFair ranking is F>C>E>A>G>D>B with Kemeny score 118, but
>> C>A>F>E>G>D>B has Kemeny score 119 and is the unique maximum ranking.
> Yes, the default value for variable
> "global_check_all_scores_choice_limit" is 6 and it gives a result that
> differs from the (full) Condorcet-Kemeny method.
> Increasing this variable to 7 causes the full Kemeny calculation process
> to be done across all 7 choices, and it gets the same result as doing
> the full Condorcet-Kemeny calculation method.
> This is consistent with what I said earlier.
> Of course the calculation time for the case in which there is a
> Condorcet (rock-paper-scissors) cycle across 50 choices is going to be
> way too time-consuming for this software.
> As I've also said before, the odds of such a cycle (involving either 7
> or 50 choices) happening in a real election is lower than the odds of a
> conventional tie.  Either kind of tie can be resolved using a judicial
> decision -- like the Bush versus Gore decision from the US Supreme
> Court, which was not even an exact tie.

Do you agree with my point about the use of the term "mathematically
equivalent"? If the method appears to be equivalent, that might give the
impression that you don't need to care about cycles at all.

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